Dental bridge.



H. P. BOOS.

DENTAL BRIDGE.

APPLICATION FILED APR.30, 1914.

1,1 1 1,730. Patented Sept. 29, 1914 H6. 2 I y W/T/VE88E8: IIVI/EA/TOR 244 6g f/E/VPY P .5006- a 59%;! BY

ATTORNEY THE AORRIS PETERS cu, PHOTO-LITHQ, wAsHlNGmN. By C.

7 UNITED STATES PATENTOFFIcE.

j HENRY P. BOOS, or YMINNEAIIQLIS, MINNESOTA.

and State of Minnesota, have invented certam new and useful Improvements in Dental I Bridges, specification.

My invention relates to dental'bridges, and has for its object to provide a new of which the following is a .and improved means of anchoring a bridge extension carrying one or more artificial teeth to'one or. more crowned roots The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In the drawings, illustratin the application of my invention in one form, Figure 1 illustrates a portion of a mold of the upper jaw viewed from theinside, showing the crown thereon having the means for receiving and holding my bridge-extension. Fig. 2 is a View similar to Fig. 1 showing the bridge-extension in position. Fig. ,3 is a detail View ofthe bridge-extension separate from the teeth With which it cooperates.

Fig. 1 is a sectionalview on line 4E4 of Fig. 1.

Thecrown is formed, preferably over two teeth 10 and 11, as indicated in Figs. 1 and 2. This crown is provided on the'inside thereof with a pair of grooved extensions 12, 13, and the inner tooth.10 has on the inside thereof a projecting ledge 14. The

bridgeextensioncomprises a plate 15 of the usual character adapted to rest upon the gum carrying one or more teeth 16. l The plate 15 has rigidly secured thereon an extension 17, preferably of metal, which extension is provided with a pair of grooved mn'rar. B IDGE.

Specification of Letters Patent. Patentd Sept. 29, 1914:. Application filed April 30, 1914. Serial No. 835,431.

sockets 18, 19 adapted to receive and slide down over the grooved extensions 12, 13. A spring finger 20 is secured to the portion 17 at a. point near the inner socket 19 and extends in a direction such that the curved end 21 of said finger 20 may engage beneath the pro-1 jecting ledge 14 of the crown 10 when the bridge is applied in position, and will snap under said ledge so as to apply to a certain amount of pressure to the piece 17 and hold the plate 15 firmly in contact With the gum.

\Vith this appliance a plate of artificial teeth, such .as 16, will be practically as ef- Iicient and substantial as natural teeth. The

spring finger 20, particularly in combination with ledge 14: and the posts 12, 13 in sockets 18, 19, provides a particularly efficient and satisfactory means of. holding the tooth plate permanently in operative position. I 1

I claim:

An appliance for dentistry bridge-work comprising a double tooth crown, a pair of posts formed along the inside of said crown and adjacent the back edges of the teeth,

one of said teeth being provided with an inwardly-extending projecting portion on the side thereof, a plate having a member provided with a pair of sockets for sliding over said posts, and a spring finger secured at its end to said member adjacent the rear socket and engageable with said projecting portion to hold the plate in operative position. In testimony whereof I aflix my signature in presence of two witnesses.

, HENRY P. BOOS.

"Witnesses F. A. W'HITELEY, H. A. BOWMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 1 Washington, D. G. i 

